The application scope of LED lighting electrical is extended accelerated. It has superior quality compared with traditional source lighting electrical since enter lighting field, especially under the background of ‘energy reduction’ globally. Accordingly, the manufacturers and users are more anxious to know the product quality standards and regulations of LED lighting electrical. This is a starting point, making a pervasive introduction of LED lighting electrical inspection and certification, focus on LED lights security required under the CCC range.

The important terms and basic concepts of LED lighting electrical.

LED: The P-N semiconductor device emit noncoherent light radiation when forward bias.

LED module: Components integrated by one or more LEDs in the printed circuit board with optical elements, heat elements, machinery elements and electrical interface, but not include power supply and standard lamp holder.

LED lights: It’s the components include LED module and standard lamp holder, divide into overall style (have LED drive) and non-overall style (have not LED drive).

LED light source: LED, LED module and LED lights.

LED connector: inside connection work with printed circuit board which based on LED module.

LED drive: has the power supply and LED control circuit device, aim is make LED source work.

LED light: It’s a device can assign, through and transform the light emitted by LED light source, including support, fixed and all necessary parts to protect LED source ( not including LED source), the necessary circuit subsidiary device and the device connected with power.

LED lighting electrical standards

LED lighting electrical standards base on the safety, performance and electromagnetic compatibility separated principles, established according to products category. The following sheet 1 and sheet 2 are the standards which we followed and refered  when we do the inspection and certification of the LED lighting electrical.

Sheet 1

Sheet 2

The safety requirement of LED lights

First, we must be clear the basic principles of lights safety standards: "source emit light, lamp use light"- the light used to illume emitted by source, lamp fixtures is to optimize light divergence and ensure the safety of using light source, so light  safety standards does not involve the requirements of  light source itself; "separate the naming and light source , service for illume" – lamps take advantage of light emitted by the light source service for illume,  the classification and naming of lamps should not relevant with light source , but directly reflect its service capabilities, objects and places.

 On the basis of full understanding above two principles, we can easily find the already existing national standards are applicable to LED lamps,  while some of the known characteristics of LED lamps did not embody in the existing standards , need to developed special performance and energy efficiency standards of LED light against LED lamps characteristics . In other words, LED lamps can be classified to the embedded lights, fixed general lamps, portable general purpose lamps, aquarium lamps, power outlet mounted nightlights, embedded floor lamps to apply for CCC certification .

The following questions and answers are on the way to solve the frequently asked questions about safety requirements of LED lights CCC certified .

How to divide certification unit ?
① installation; ② light source; ③ level of protection against electric shock; ④ protection of enclosure; ⑤ mounting surface materials, insulation materials cover; ⑥ light control device; which has above same 6 points and similar structure can be divided into the same unit.

What forms of protection against electric shock?
Class Ⅰ - basic insulation + protective earth; classⅡ- double insulation / reinforced insulation; class  Ⅲ  - supply voltage SELV +lamp work voltage SELV.

 How to take protective measures and locate power supply terminals?
Generally placed  insulated liner under terminal, and double-screw fixation, the purpose is to make the  free conductor possibly divorced from stranded conductor after connection does not touch metal parts (for power conductor), or live parts (for the grounding conductor) .

 What are the limitations in the use of self-tapping screws?
Self-tapping screws can’t be used to connect current-carrying parts unless there is proper locking devices (such as spring washers); self-tapping screws can’t be used to provide ground continuity unless there are at least two of each connection.

How to determine which parts based on breakable glass or translucent cover requirements to have impact test ?
If remove these parts, the lighting IP protection is not lower, protection against electric shock is still up to standard, ultraviolet and light sputtering hazard protection is still up to standards. If there is any negative answer, it should be treated as delicate parts and having the impact test.

What is the mechanical requirements of charged flexible cables for hanging lamps?
Select soft rope which conductor cross-sectional area is large enough, when hanging the conductor force in not over15N/mm2.

What are the requirements of marked symbol or symbols lamps ?

(1) Temperature requirements of mounting surface: installation surface temperature does not exceed 90 +5 ℃ and 130 +5 ℃ when normal and abnormal work heat test; 
(2) light control device type requirements: there is no further requirements for the control devices with IEC61558-2-4/IEC61558-2-6/IEC60989 transformer and electronic lamp;
(3) Installation of surface spacing requirements: At least 10mm (lamp shell in the light control device projection plane is continuous, light control device to the inner surface of lamps shell is at least 3mm, outer surface of lamp to the mounting surface is at least 3mm); or at least 35mm (lamp shell in the light control device projection plane is not continuous, there is a direct pathway between light control device and the mounting surface);

(4) Type requirements with thermal protector : there is no further requirements for the thermal protection with marked symbols and symbols(... not more than 130) ; with and without  symbols (... more than 130) thermal protector should further meet the conditions of the lamp control device failure heat test requirements.

What circumstances need to be equipped cord holder?
When use removable soft rope or wire (the power soft rope or cord, interconnect cable) on lighting provided or designed,  its parts out of lights is more than 80mm, flexible wire fixation is required.

Is there any special requirements for Ⅲ type lamp plug?
Ⅲ type lamps can’t use the plug in accordance with GB1002/GB1003

How to complete the loop installation of  lights?
The loop installation of  lights can only be completed by appliance coupler and terminals.

Can the SELV parts be insulated?
Yes. However, if it is insulated, it should meet the relevant  requirements about the insulation resistance and electrical strength.

Which parts of Ⅰ type lamps must be grounded?
With only basic insulation between live parts and the metal parts can be touched(the installation is completed, open for the replacement of the light source and the initiator or easy to support surface contact .

 How to pretreatment samples between the insulation resistance and electrical strength?
Samples should be placed in moist chamber for 48 hours, the humidity of box should be maintained at 91% -95%, temperature should be maintained between 20 ℃ -30 ℃ .

LED lamps live parts of different polarity connect LED module and LED drive, require functional conduction, is not required the electrical strength of insulation resistance testing?
LED lamps live parts of different polarity require insulation resistance and electrical strength test, when testing, functional components between live parts of different polarity should be removed, so the test voltage is applied on the parts insulation .

 Is there any requirements of creepage distance and electrical clearance between SELV  components?
There is no requirements of creepage distance and electrical clearance when working voltage is less than25V . Note that the notch is less than 1mm,  only calculate notch width; when less than 1mm clearance, calculating electrical gap is negligible.

 What is the special requirements about LED lamps Durability Test?
Whether there is abnormal working conditions or not, the durability of LED lighting tests are uniformly applied 1.10Un, continued to240h (normal 10 × 24h).

What is special requirements about LED lamps Thermal Test  ?
Normal work thermal test  adopt 1.06Un (measure TC values components temperature adopt 1.00Un), if the connection of  LED module and LED driver is welding  and terminal  split, there is no need to do abnormal work  thermal test , or adopt 1.10Un to do it .

 What is the requirements about luminaries smoothness?
Luminaries  should be no dumping when6 ° tilt, if dumping when15 ° tilt , the light  should be placed in accordance with the position after dumping when abnormal work thermal test  .

What is the special requirements of power outlet mounted nightlights thermal test ?
Except the abnormal working conditions listed inGB7000.1 , the abnormal working conditions of new night light with a cover , lights should work 7h continuously under 1.00Un  or until damaged.

What is the special requirements for level of IP protection of embedded lamps on the ground ?
(1) IP65 + drainage; (2) IP65 + IP67;
There are more IP level, such as IP65 + IP67 + IP68.